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  1. #1
    LuvHartwell's Avatar
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    Lightbulb 2003 Polaris Genesis - Backfiring and won't start after sitting for 2 years

    Hi Everyone,

    TJ here form Lake Hartwell GA. I'm very happy to have found this forum!

    I purchased a 03 Polaris Genesis yesterday. Approx 100 hours on it. I got it at a good price or so I thought since it wasn't running (no battery). This was purchased from a neighbor I know pretty well. He lives about 2 miles away and has to drive by my house to get to our local boat ramp. I used to see him all the time pulling it back-and-forth to the ramp so I know it was running 2 seasons ago.

    He had it winterized and in a storage shed for the past 2 years.

    I installed a new battery, plugs, fresh gas and oil. I followed the start-up procedure in the manual. It backfires loud and hard enough blow off one of the muffler hose clamps.

    From everything I've read on other forum post about similar problems it's most likely a bad EMM. I'm ready to pull the unit and send it to DFI for testing and repair but I'd be interested in any other suggestions on what to do next.

    Thanks,

    TJ


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome

    DFI repair seems appropriate.

    Make sure everything else is in good order, from intake reeds to cylinder compression to possible cracked plastic exhaust resonators.

    Make sure the correct spark plugs are installed.

    See my signature links for some common maintenance items.

  3. #3
    LuvHartwell's Avatar
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    Thanks for the prompt reply K447. I have a buddy coming over today that going to help me check everything in detail. We will go over everything you recommended.

    I couldn't find anything that stood out when I inspected the unit but I'm far from an expert. As a matter a fact it almost looked showroom new.

    For those interested I negotiated the seller down from $2,250 to $1,450 for the Ski and trailer.

  4. #4
    LuvHartwell's Avatar
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    When I pulled the EEM I found quite a bit of corrosion.Is this what we should normally expect to see?

    Click image for larger version. 

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  5. #5
    Polaris John's Avatar
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    Quote Originally Posted by LuvHartwell View Post
    When I pulled the EEM I found quite a bit of corrosion.Is this what we should normally expect to see?

    Click image for larger version. 

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    Is that rust can you tell or heat damage? It doesnt look bad if its just a little rust. Nice ski.

  6. #6
    LuvHartwell's Avatar
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    It appears to be just rust. No heat discoloration patterns. I'm guessing it just from 10 years of moisture getting trapped between the unit and mounting bracket.

  7. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    did you drain all of the fuel and replace..or just add some fresh in on top of it?

  8. #8
    LuvHartwell's Avatar
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    The ski was bone dry. Put in 10 gal of fresh fuel. 87 Octane per the manual.

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by LuvHartwell View Post
    The ski was bone dry. Put in 10 gal of fresh fuel. 87 Octane per the manual.
    89 octane minimum if the gasoline is 'oxygenated' which almost all fuel is these days, including anything with ethanol.

    Top the tank off with premium gasoline to bring the average octane level up.

    87 octane will not cause the troubles you describe, but it will put the engine at risk during mid-throttle and higher power levels.

  10. #10
    LuvHartwell's Avatar
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    Thanks for the heads up. I'll make sure to top it off. Is it okay to run 93 all the time in the future? Also, i run Seafoam through my Evinrude outboards for my fishing and pontoon boats every so often to keep the running clean. Is it safe and/or advisable to use Seafoam in the Polaris?

    Thanks... TJ

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